Here are simple, Jain-friendly baby girl name ideas by starting letters:

Starting with Dh

• Dhara – धरಾ – earth; steady, firm
• Dhriti – धृति – courage, patience, inner strength
• Dhyana – ध्यान – meditation, spiritual focus
• Dhanyā – धन्या – blessed, fortunate

Starting with N

• Nemi / Nemisha – नेमी / नेमीशा – remembering Bhagwan Neminath
• Nirmalā – निर्मला – pure, spotless
• Nandini – नंदिनी – joyful, delightful
• Nitya – नित्या – constant, eternal

Starting with M

• Malli / Mallikā – मल्लि / मल्लिका – linked to Bhagwan Mallinath
• Maitrī – मैत्री – friendliness, loving-kindness
• Mridulā – मृदुला – soft, gentle
• Madhurī – माधुरी – sweetness

More M-name ideas here and here

Starting with Bh

• Bhavyā – भाव्या – noble, splendid; also used in Jain texts for auspicious beings
• Bhāvinī – भाविनी – devotional, full of feeling
• Bhakti – भक्ति – devotion
• Bhāratī – भारती – associated with knowledge, learning

Starting with La

• Lalitā – ललिता – graceful, charming
• Lavanyā – लावण्या – beauty, grace
• Lipi – लिपि – script; auspicious writing (can recall scriptures)
• Lajjā – लज्जा – modesty, humility

More L suggestions here

Starting with Ch

• Chandanā – चंदना – sandalwood; also linked with Chandanbālā, great Jain sati
• Charitā – चरिता – good conduct, character
• Charvī – चार्वी – beautiful, charming
• Chandraprabhā – चंद्रप्रभा – moon-radiance; connected to Tirthankar Chandraprabha

If you want, you can choose especially Jain-rooted ones like: Malli, Nemi/Nemisha, Maitrī, Ahimsā, Samatā, Padmāvatī, Ambikā, etc., which are inspired directly by Tirthankars, devis or Jain virtues. For a larger Jain baby girl list you can also see this collection